In an extraordinary 1,800-word report Friday, which offered no evidence other than account laced with fantastical language, North Korean state news agency KCNA said a “hideous terrorist group” conspired with the CIA and South Korea’s Intelligence Service (IS) to mount the attack.

Its aim, the report said was to “commit bomb terrorism targeting the supreme leadership” during major events including a recent military parade.

The report claimed a North Korean citizen was involved in the plot, using “biochemical substances including radioactive substance and nano poisonous substance” to target Kim.

North Korea has a history of making unfounded and irrational claims, and CNN was not able to independently corroborate the report. South Korea’s intelligence service told CNN they know nothing about the alleged plot.

North Korea has a history of bombastic propaganda featuring unfounded claims.

Last month, the state-run newspaper Rodong Sinmun claimed US-Australian military exercises in northern Australia were preparation for nuclear war against North Korea and threatened Darwin with a potential retaliatory strike.

For its part, South Korea has admitted to having plans in place to kill Kim.

Last year, lawmakers said Seoul “has a general idea and plan to use precision missile capabilities to target the enemy’s facilities in major areas as well as eliminating the enemy’s leadership.”

The U.S. has deployed the Carl Vinson Carrier Strike Group – which has nuclear armaments – to North Korea as tensions in the region have escalated.

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